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DSM Somos® ProtoGen™ 18920 Liquid Photopolymer, UV Postcure

Category Polymer , Rapid Prototyping Polymer
Manufacturer DSM Somos
Trade Name ProtoGen™
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF DSM Somos® ProtoGen™ 18920 Liquid Photopolymer, UV Postcure.pdf
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Material Notes:
Product DescriptionDSM Somos® ProtoGen 18920 is a liquid photopolymer that produces accurate, ABS-like parts ideal for general purpose applications. ProtoGen resins are the first SL resins to demonstrate different material properties based on machine exposure control. Based on Somos Oxetane™ chemistry, ProtoGen 18920 offers superior chemical resistance, a wide processing latitude and excellent tolerance to a broad range of temperatures and humidities, both during and after build.ApplicationsThis high-temperature resistant, ABS-like photopolymer is used in solid imaging processes, like stereolithography, to build three-dimensional parts. Somos ProtoGen 18920 provides considerable processing latitude and is ideal for the medical, electronic, aerospace and automotive markets that demand accurate RTV patterns, durable concept models, highly accurate and humidity & temperature resistant parts.Key Product BenefitsHumidity & Temperature TolerantExcellent Dimensional StabilityFast Processing SpeedsInformation Provided by DSM Desotech Inc.
Physical Properties Metric English Comments
Density 1.16 g/cc

@Temperature 25.0 °C
0.0419 lb/in³

@Temperature 77.0 °F
Water Absorption 0.78 %
0.78 %
ASTM D570-98
Viscosity 350 cP

@Temperature 30.0 °C
350 cP

@Temperature 86.0 °F
Mechanical Properties Metric English Comments
Hardness, Shore D 85.6 - 86.4
85.6 - 86.4
ASTM D2240
Tensile Strength, Yield 46.6 - 47.8 MPa
6760 - 6930 psi
ASTM D638M
Elongation at Break 13 - 19 %
13 - 19 %
ASTM D638M
Tensile Modulus 2.103 - 2.317 GPa
305.0 - 336.1 ksi
ASTM D638M
Flexural Strength 73.0 - 75.0 MPa
10600 - 10900 psi
ASTM D790M
Flexural Modulus 2.126 - 2.314 GPa
308.4 - 335.6 ksi
ASTM D790M
Izod Impact, Notched 0.140 - 0.280 J/cm
0.262 - 0.525 ft-lb/in
ASTM D256A
Thermal Properties Metric English Comments
CTE, linear 69.4 µm/m-°C

@Temperature -40.0 - 0.000 °C
38.6 µin/in-°F

@Temperature -40.0 - 32.0 °F
ASTM E831-05
74.0 µm/m-°C

@Temperature 0.000 - 50.0 °C
41.1 µin/in-°F

@Temperature 32.0 - 122 °F
ASTM E831-05
106 µm/m-°C

@Temperature 50.0 - 100 °C
58.9 µin/in-°F

@Temperature 122 - 212 °F
ASTM E831-05
130.3 µm/m-°C

@Temperature 100 - 150 °C
72.39 µin/in-°F

@Temperature 212 - 302 °F
ASTM E831-05
Deflection Temperature at 0.46 MPa (66 psi) 58.7 °C
138 °F
ASTM D648-98c
Deflection Temperature at 1.8 MPa (264 psi) 51.0 °C
124 °F
ASTM D648-98c
Glass Transition Temp, Tg 69.0 °C
156 °F
ASTM E1545-00
Electrical Properties Metric English Comments
Dielectric Constant 3.21

@Frequency 1.00e+6 Hz
3.21

@Frequency 1.00e+6 Hz
ASTM D150-98
3.44

@Frequency 1000 Hz
3.44

@Frequency 1000 Hz
ASTM D150-98
3.53

@Frequency 60.0 Hz
3.53

@Frequency 60.0 Hz
ASTM D150-98
Dielectric Strength 15.4 - 15.9 kV/mm
391 - 404 kV/in
ASTM D149-97a
Descriptive Properties Value Comments
Appearance Gray
Dp (mm) 0.107
Slope of cure-depth vs. ln(E) curve
E10 (mJ/cm2) 75.7
Exposure that gives 0.254mm thickness
Ec (mJ/cm2) 7
Critical exposure
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